add back wordaround for Slot objects should not occur in an AST in Ipython mode (#47878)

Author: KristofferC

stdlib/REPL/src/REPL.jl

@@ -1404,9 +1404,9 @@ end
 
 function out_transform(@nospecialize(x), n::Ref{Int})
     return quote
-        let x = $x
-            $capture_result($n, x)
-            x
+        let __temp_val_a72df459 = $x
+            $capture_result($n, __temp_val_a72df459)
+            __temp_val_a72df459
         end
     end
 end

stdlib/REPL/test/repl.jl

@@ -1641,6 +1641,10 @@ fake_repl() do stdin_write, stdout_read, repl
     s = sendrepl2("REPL\n", "In [10]")
     @test contains(s, "Out[9]: REPL")
 
+    # Test for https://github.com/JuliaLang/julia/issues/46451
+    s = sendrepl2("x_47878 = range(-1; stop = 1)\n", "-1:1")
+    @test contains(s, "Out[11]: -1:1")
+
     write(stdin_write, '\x04')
     Base.wait(repltask)
 end